So, in order for executing Electron apps, laravel-elixir module need to be installed based on the error shown above : “Error: Cannot find module ‘laravel-elixir'”. Below is the step which is needed to be done to install module Laravel Elixir :

Electron is a framework for creating native applications with web technologies like Javascript, HTML and CSS. It takes care of the hard parts so you can focus on the core of your application. This information can be derived from its official website in http://electron.atom.io

To be able to install electron, npm which is a default package manager for the JavaScript runtime environment Node.js